I have to admit my average speed on motorways has come down by around 10mph, especially on longer drives. This makes quite a big difference to the range consumption. I also ease off by around another 5mph when there is an uphill incline and speed up 5mph when there is a good downhill stretch.
That combined with lowering the cabin temp and fan speed a little and minimising use of AC and generally being a little more measured when accelerating and braking can make the difference between needing a supercharger stop or not on some journeys, especially in the cold.